Knob



FIG. 1 is an elevated perspective view of the knob of the present claimed design;

FIG. 2 is a side view of the knob shown in FIG. 1, the opposite side view being identical thereto;

FIG. 3 is an end view of the know shown in FIG. 1, the opposite end view being identical thereto;

FIG. 4 is a top view of the knob shown in FIG. 1; and,

FIG. 5 is a bottom view of the knob shown in FIG. 1.

Features shown in broken lines in the drawings are not part of the claim. 

We claim the ornamental design for a knob, as shown and described. 